is the definitive international standard governing the design, manufacture, and testing of electronic equipment used on railway rolling stock . Published by the International Electrotechnical Commission (IEC) , this standard guarantees that critical onboard systems—such as control units, safety regulation systems, and power supplies—can function reliably under the extreme environmental stresses unique to railway transport.
: These include power supply variation tests (verifying operation at nominal voltage and specified upper and lower limits) and power interruption tests to ensure proper operation without operator intervention after power restoration. iec 60571pdf